Originally posted by jimvance
Morihei Ueshiba Sensei had tremendous kiai. According to Saito Sensei and Shirata Sensei (a la John Stevens) you could hear it from a ways off.
"O-sensei's kiai was a high, ear-piercing shout that you could hear almost half a mile away, and it would just stop you ded in your tracks. It was deafening, it hurt your eardrums. It permeated your whole body, your entire being, you could feel it spiritually, mentally, and physically. It made you weak, made you sometimes want to just collapse... With O-sensei, you didn't jump, you just collapsed, you felt instantly sapped."
From Aikido Kyohan: Complete Aikido, pg. 73.
Hope it helps,